1/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22#include "uv.h"
23#include "task.h"
24
25#include <stdio.h>
26#include <stdlib.h>
27#include <string.h>
28
29#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
30#include <sys/sysctl.h>
31#endif
32
33#define CHECK_HANDLE(handle)                \
34  ASSERT((uv_udp_t*)(handle) == &server     \
35      || (uv_udp_t*)(handle) == &client     \
36      || (uv_timer_t*)(handle) == &timeout)
37
38#define CHECK_REQ(req) \
39  ASSERT((req) == &req_);
40
41static uv_udp_t client;
42static uv_udp_t server;
43static uv_udp_send_t req_;
44static char data[10];
45static uv_timer_t timeout;
46
47static int send_cb_called;
48static int recv_cb_called;
49static int close_cb_called;
50static uint16_t client_port;
51
52#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
53static int can_ipv6_ipv4_dual(void) {
54  int v6only;
55  size_t size = sizeof(int);
56
57  if (sysctlbyname("net.inet6.ip6.v6only", &v6only, &size, NULL, 0))
58    return 0;
59
60  return v6only != 1;
61}
62#endif
63
64
65static void alloc_cb(uv_handle_t* handle,
66                     size_t suggested_size,
67                     uv_buf_t* buf) {
68  static char slab[65536];
69  CHECK_HANDLE(handle);
70  buf->base = slab;
71  buf->len = sizeof(slab);
72}
73
74
75static void close_cb(uv_handle_t* handle) {
76  CHECK_HANDLE(handle);
77  close_cb_called++;
78}
79
80
81static void send_cb(uv_udp_send_t* req, int status) {
82  CHECK_REQ(req);
83  CHECK_HANDLE(req->handle);
84  ASSERT(status == 0);
85  send_cb_called++;
86}
87
88static int is_from_client(const struct sockaddr* addr) {
89  const struct sockaddr_in6* addr6;
90  char dst[256];
91  int r;
92
93  /* Debugging output, and filter out unwanted network traffic */
94  if (addr != NULL) {
95    ASSERT(addr->sa_family == AF_INET6);
96    addr6 = (struct sockaddr_in6*) addr;
97    r = uv_inet_ntop(addr->sa_family, &addr6->sin6_addr, dst, sizeof(dst));
98    if (r == 0)
99      printf("from [%.*s]:%d\n", (int) sizeof(dst), dst, addr6->sin6_port);
100    if (addr6->sin6_port != client_port)
101      return 0;
102    if (r != 0 || strcmp(dst, "::ffff:127.0.0.1"))
103      return 0;
104  }
105  return 1;
106}
107
108
109static void ipv6_recv_fail(uv_udp_t* handle,
110                           ssize_t nread,
111                           const uv_buf_t* buf,
112                           const struct sockaddr* addr,
113                           unsigned flags) {
114  printf("got %d %.*s\n", (int) nread, nread > 0 ? (int) nread : 0, buf->base);
115  if (!is_from_client(addr) || (nread == 0 && addr == NULL))
116    return;
117  ASSERT(0 && "this function should not have been called");
118}
119
120
121static void ipv6_recv_ok(uv_udp_t* handle,
122                         ssize_t nread,
123                         const uv_buf_t* buf,
124                         const struct sockaddr* addr,
125                         unsigned flags) {
126  CHECK_HANDLE(handle);
127
128  printf("got %d %.*s\n", (int) nread, nread > 0 ? (int) nread : 0, buf->base);
129  if (!is_from_client(addr) || (nread == 0 && addr == NULL))
130    return;
131
132  ASSERT(nread == 9);
133  ASSERT(!memcmp(buf->base, data, 9));
134  recv_cb_called++;
135}
136
137
138static void timeout_cb(uv_timer_t* timer) {
139  uv_close((uv_handle_t*)&server, close_cb);
140  uv_close((uv_handle_t*)&client, close_cb);
141  uv_close((uv_handle_t*)&timeout, close_cb);
142}
143
144
145static void do_test(uv_udp_recv_cb recv_cb, int bind_flags) {
146  struct sockaddr_in6 addr6;
147  struct sockaddr_in addr;
148  int addr6_len;
149  int addr_len;
150  uv_buf_t buf;
151  char dst[256];
152  int r;
153
154  ASSERT(0 == uv_ip6_addr("::0", TEST_PORT, &addr6));
155
156  r = uv_udp_init(uv_default_loop(), &server);
157  ASSERT(r == 0);
158
159  r = uv_udp_bind(&server, (const struct sockaddr*) &addr6, bind_flags);
160  ASSERT(r == 0);
161
162  addr6_len = sizeof(addr6);
163  ASSERT(uv_udp_getsockname(&server, (struct sockaddr*) &addr6, &addr6_len) == 0);
164  ASSERT(uv_inet_ntop(addr6.sin6_family, &addr6.sin6_addr, dst, sizeof(dst)) == 0);
165  printf("on [%.*s]:%d\n", (int) sizeof(dst), dst, addr6.sin6_port);
166
167  r = uv_udp_recv_start(&server, alloc_cb, recv_cb);
168  ASSERT(r == 0);
169
170  r = uv_udp_init(uv_default_loop(), &client);
171  ASSERT(r == 0);
172
173  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
174  ASSERT(uv_inet_ntop(addr.sin_family, &addr.sin_addr, dst, sizeof(dst)) == 0);
175  printf("to [%.*s]:%d\n", (int) sizeof(dst), dst, addr.sin_port);
176
177  /* Create some unique data to send */
178  ASSERT(9 == snprintf(data, sizeof(data), "PING%5u", uv_os_getpid() & 0xFFFF));
179  buf = uv_buf_init(data, 9);
180  printf("sending %s\n", data);
181
182  r = uv_udp_send(&req_,
183                  &client,
184                  &buf,
185                  1,
186                  (const struct sockaddr*) &addr,
187                  send_cb);
188  ASSERT(r == 0);
189
190  addr_len = sizeof(addr);
191  ASSERT(uv_udp_getsockname(&client, (struct sockaddr*) &addr, &addr_len) == 0);
192  ASSERT(uv_inet_ntop(addr.sin_family, &addr.sin_addr, dst, sizeof(dst)) == 0);
193  printf("from [%.*s]:%d\n", (int) sizeof(dst), dst, addr.sin_port);
194  client_port = addr.sin_port;
195
196  r = uv_timer_init(uv_default_loop(), &timeout);
197  ASSERT(r == 0);
198
199  r = uv_timer_start(&timeout, timeout_cb, 500, 0);
200  ASSERT(r == 0);
201
202  ASSERT(close_cb_called == 0);
203  ASSERT(send_cb_called == 0);
204  ASSERT(recv_cb_called == 0);
205
206  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
207
208  ASSERT(close_cb_called == 3);
209
210  MAKE_VALGRIND_HAPPY();
211}
212
213
214TEST_IMPL(udp_dual_stack) {
215#if defined(__CYGWIN__) || defined(__MSYS__)
216  /* FIXME: Does Cygwin support this?  */
217  RETURN_SKIP("FIXME: This test needs more investigation on Cygwin");
218#endif
219
220  if (!can_ipv6())
221    RETURN_SKIP("IPv6 not supported");
222
223#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
224  if (!can_ipv6_ipv4_dual())
225    RETURN_SKIP("IPv6-IPv4 dual stack not supported");
226#elif defined(__OpenBSD__)
227  RETURN_SKIP("IPv6-IPv4 dual stack not supported");
228#endif
229
230  do_test(ipv6_recv_ok, 0);
231
232  printf("recv_cb_called %d\n", recv_cb_called);
233  printf("send_cb_called %d\n", send_cb_called);
234  ASSERT(recv_cb_called == 1);
235  ASSERT(send_cb_called == 1);
236
237  return 0;
238}
239
240
241TEST_IMPL(udp_ipv6_only) {
242  if (!can_ipv6())
243    RETURN_SKIP("IPv6 not supported");
244
245  do_test(ipv6_recv_fail, UV_UDP_IPV6ONLY);
246
247  ASSERT(recv_cb_called == 0);
248  ASSERT(send_cb_called == 1);
249
250  return 0;
251}
252